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Finding the Third Proportional to 2,640 and 4,431

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Solution

The third proportional to 2,640 and 4,431 is: 7,437.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640 : 4,431 = 4,431 : x
  2. Step 2: Convert to fraction form
    2,640/4,431 = 4,431/x
  3. Step 3: Cross multiply
    2,640x = 4,431 × 4,431
  4. Step 4: Simplify right side
    2,640x = 19,633,761
  5. Step 5: Solve for x
    x = 19,633,761/2,640
  6. Step 6: Final answer
    x = 7,437.03

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Why These Related Problems?

These problems maintain the same ratio (1.68) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.